Nintendo DS

Boots a Nintendo DS homebrew ROM on a WebAssembly build of DeSmuME (ARM9 + ARM7). Both DS screens are stacked; the LOWER screen is the touchscreen — click/drag on it to touch. Arrow keys = D-pad; X = A, Z = B, S = X, A = Y; Q = L, W = R; Enter = Start, Right-Shift = Select. Use the on-screen pad on touch. Open the debugger to read the live ARM9 (and ARM7 sub-PC) registers and memory, single-step one instruction, set execution breakpoints and memory watchpoints, and pause/resume. Click the screen first so it captures the keyboard.